Halle’s Smooooth Words o’ Wisdom

We just purchased a used vehicle in Missoula, Montana. Incredibly, I was able to drive the new rig home on 1 tank of fuel. That’s right: 1 tank of fuel. Fumes powered me the last 30 miles I’m sure but I still made it. Can you guess the type of rig? Hint: it’s not an overpriced stop-gap hybrid. Another hint: don’t buy them in Portland or Seattle as you’ll pay a 2-3k premium. It’s cheaper to fly to most places in the west and drive them home yourself. First correct guess gets a free 8.5 x 11 print of your choice.